Fixed minor issue.

Author: Hovsep Mkrtchyan

src/ResourceManager/Profile/Commands.Profile/Context/SetAzureRMContext.cs

@@ -105,7 +105,11 @@ protected override void ProcessRecord()
                 {
                     // authenticate with just tenant id
                     AzureTenant tenant;
-                    profileClient.TryGetSubscription(tenantId, null, out subscription, out tenant);
+                    if(!profileClient.TryGetTenantAndSubscription(tenantId, null, out subscription, out tenant))
+                    {
+                        throw new ItemNotFoundException(
+                            string.Format(Resources.TenantIdNotFound, tenantId));
+                    }
                     if (subscription == null)
                     {
                         profileClient.SetCurrentContext(tenant.Id.ToString());

src/ResourceManager/Profile/Commands.Profile/Models/RMProfileClient.cs

@@ -198,10 +198,10 @@ public List<AzureTenant> ListTenants(string tenant)
         public bool TryGetSubscription(string tenantId, string subscriptionId, out AzureSubscription subscription)
         {
             AzureTenant tenant;
-            return TryGetSubscription(tenantId, subscriptionId, out subscription, out tenant);
+            return TryGetTenantAndSubscription(tenantId, subscriptionId, out subscription, out tenant);
         }
 
-        public bool TryGetSubscription(string tenantId, string subscriptionId, out AzureSubscription subscription, out AzureTenant tenant)
+        public bool TryGetTenantAndSubscription(string tenantId, string subscriptionId, out AzureSubscription subscription, out AzureTenant tenant)
         {
             if (string.IsNullOrWhiteSpace(tenantId))
             {

src/ResourceManager/Profile/Commands.Profile/Properties/Resources.Designer.cs

@@ -156,6 +156,9 @@
   <data name="TenantAuthFailed" xml:space="preserve">
     <value>Could not authenticate with tenant {0}. Please ensure that your account has access to this tenant and log in with Login-AzureRmAccount</value>
   </data>
+  <data name="TenantIdNotFound" xml:space="preserve">
+    <value>Unable to find tenant '{0}'.</value>
+  </data>
   <data name="TypeNotAccessToken" xml:space="preserve">
     <value>To create an access token credential, you must provide an access token account.</value>
   </data>